graphview.h

/***

    Olive - Non-Linear Video Editor
    Copyright (C) 2019  Olive Team

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

***/

#ifndef GRAPHVIEW_H
#define GRAPHVIEW_H

#include <QWidget>
#include <QVector>

class EffectRow;
class EffectField;

QColor get_curve_color(int index, int length);

class GraphView : public QWidget {
    Q_OBJECT
public:
    GraphView(QWidget* parent = 0);

    void paintEvent(QPaintEvent *event);
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);
    void wheelEvent(QWheelEvent *event);

    void set_row(EffectRow* r);

    void set_selected_keyframe_type(int type);
    void set_field_visibility(int field, bool b);

    void delete_selected_keys();
    void select_all();
signals:
    void x_scroll_changed(int);
    void y_scroll_changed(int);
    void zoom_changed(double, double);
    void selection_changed(bool, int);
private:
    int x_scroll;
    int y_scroll;
    bool mousedown;
    int start_x;
    int start_y;

    double x_zoom;
    double y_zoom;

    void set_scroll_x(int s);
    void set_scroll_y(int s);
    void set_zoom(double xz, double yz);

    int get_screen_x(double);
    int get_screen_y(double);
    long get_value_x(int);
    double get_value_y(int);

    void selection_update();

    QVector<bool> field_visibility;

    QVector<int> selected_keys;
    QVector<int> selected_keys_fields;
    QVector<long> selected_keys_old_vals;
    QVector<double> selected_keys_old_doubles;

    double old_pre_handle_x;
    double old_pre_handle_y;
    double old_post_handle_x;
    double old_post_handle_y;

    int handle_field;
    int handle_index;

    bool moved_keys;

    int current_handle;

    void draw_lines(QPainter &p, bool vert);
    void draw_line_text(QPainter &p, bool vert, int line_no, int line_pos, int next_line_pos);

    EffectRow* row;

    bool rect_select;
    int rect_select_x;
    int rect_select_y;
    int rect_select_w;
    int rect_select_h;
    int rect_select_offset;

    long visible_in;

    bool click_add;
    bool click_add_proc;
    EffectField* click_add_field;
    int click_add_key;
    int click_add_type;
private slots:
    void show_context_menu(const QPoint& pos);
    void reset_view();
    void set_view_to_selection();
    void set_view_to_all();
    void set_view_to_rect(int x1, double y1, int x2, double y2);
};

#endif // GRAPHVIEW_H